/Engine/Source/Developer/LocalizationService/Public/ILocalizationServiceState.h
Get an item from the history
a history item or NULL if none exist
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< class [ILocalizationServiceRevision](API\Developer\LocalizationService\ILocalizationServiceRevision), ESPMode::ThreadSafe > GetHistoryItem ( int32 HistoryIndex ) const